Answer:
b. 36
Step-by-step explanation:
By the property of intersecting chords inside a circle.
[tex]84 \degree = \frac{1}{2} (x \degree + 132 \degree) \\ 84 \degree \times 2= x \degree + 132 \degree \\ 168 \degree = x \degree + 132 \degree \\ 168 \degree - 132 \degree = x \degree \\ x = 36 \degree \\ \huge \purple{ \boxed{ x = 36}}[/tex]